error when starting the Gecko

[jon2k8]

The first few times i loaded the gecko it worked great. but i turned off my wii and when i went to restart it the screen appeared with the blue background and the black box with the green gecko icon at the bottom but that was it. I have tried uninstalling and reinstalling. i have tried multipul versions. i have even redone the SD card from sratch and still it wont load properly. any ideas?